Set up gauge



Aug. 11, 1959 R. A. NoRDQUls-r ETAL 2,898,685

I SET UP GAUGE Filed July 2, 1956 FIB.- 553%?! United States Patent SET UP GAUGE Richard A. Nordquist, Robert C. Miller, and James R. Bukosky, Minneapolis, and Howard W. Lindgren, St. Paul, Minn., assignors to Penta Incorporated, Minneapolis, Minn., a corporation of Minnesota Application July 2, y1956, Serial No. 595,337

8 Claims. (Cl. 33-17 0) This invention relates to a set up gauge and While it is applicable for use with many types of cutting or boring tools, in the embodiment of the invention here illustrated and described, particular reference is made to the use of said gauge in connection with drills. Difculty is experienced in accurately setting .a drill quickly to cut an exact desired depth. A trial and error process is generally used which is time consuming, not efficient and not accurate. The drill point itself adds to the difficulty of accurately setting a drill as said point is frequently sharpened and is of no specific depth or distance from its point to the first point of maximum cutting width of said drill. It is particularly desirable also to have a quick and elicient means for setting drills in a multiple drill head where said drills may be of diierent sized diameters to bring said drills into a desired relation one with another to have the same or specifically different cutting depths.

It is an object of this invention to provide a device for quickly and accurately setting a boring tool such as a drill for a desired cutting depth from its first point of maximum cutting width. f

It is another object of this invention to provide a device comprising a gauge adapted to accurately set drills of diEerent diameters for cutting the same depth.

t It is another object of this invention to provide a device comprising a gauge for use with a multiple drill head having a plurality of drills therein of different sized diameters to bring said drills into alignment in a common plane at the first point of their maximum cutting width and to set said drills to cut at the same or different depths in a specific desired relation one with another.

It is a further object of this invention to provide a device comprising .a gauge having a portion `having a recess with inclined sides such as a conical `recesstherein and having a scale thereon calibrated to the width of said recess at different points.

It is a more specific object of this invention to provide e e' a devicecoinprisinga gauge having a member having a conical recess therein, a second member, said first member being movably connecting said first and second members and a scale on said second member calibrated to member having oppositely ex-tending internally threaded barrel portions, one of said barrel portions being movable into said sleeve and adapted to have threaded thereinto the other end of said screw, a member having a sleeve adapted to receive therein the other of said barrel portions, a screw axially disposedhin said last mentioned sleeve and having one "end secured therein and having its other end threaded intosaid last mentioned barrel portion, said lasttmentioned member havinga portion upstanding therefrom having a conical.; recess therein Vand co-operatingscaleson said last mentioned barrel f2,898,685 Patented Aug. 11, 1959 portion and sleeve calibrated to the width of said recess at diierent points.

These and other objects and advantages of the invention will be fully set forth in the following description made in connection with the accompanying drawings in which like reference characters refer to similar parts throughout the several views and in which:

Fig. 1 is a view in front elevation with a portion in section showing applicants device in an operating position in connection with a partial view in front elevation of a multiple drill head; and

Fig. 2 is a view of applicants device in central vertical section on an enlraged scale.

Referring to the drawings, applicants device comprising a set up gauge is shown having a base 10. In the embodiment of applicants device as here illustrated, said base 10 is cylindrical in form having a knurled outer surface and a lower portion of small width and of reduced diameter. Said base 10 has an internally threaded central bore 10a having a counterbore 10b therein. Upstanding from said base 10 is a thimble 11 having its lower end portion threaded into said bore 10a. The upper edge portion 11a of said thimble 11 is beveled and carries thereon a scale 11b. Said scale as here illustrated is graduated into twenty-tive parts whereby said complete scale conforms to the pitch of a micrometer screw to be described and represents one revolution of said screw.

As here illustrated, said thirnble 11 has. an upper portion 11e of reduced diameter having a threaded shoulder 11d formed adjacent thereto. A plurality of apertures 11e are formed adjacent said shoulder and adapted to be seated in each of said apertures are members 11] here shown to be spherical in form. Threaded onto said shoulder 11d is a lock nut 16 and a -pin 22 to retain said lock nut is secured in said sleeve 11 adjacent said nut to provide movement of said nut but to prevent it from becoming entirely disengaged from said sleeve.

A barrel assembly 13 is provided having a central portion 13a shown here to be enlarged, cylindrical in form and having a knurled outer surface. Extending oppositely from each end of said central portion 13a are barrels 13b and 13C of some length. and are here illustrated as being internally threaded. Said barrel 13b is of a size to slidingly t into said thimble 11.

- Axially disposed in said thimble 11 is a micrometer screw or measuring screw 15. Said screw in the embodiment of the invention as here illustrated is threaded to have the equivalent of forty threads :per inch, with each revolution of said screw being equivalent to said scale 11b. The lower end 15a of said screw 15 shown here to be somewhat reduced in diameter is positioned in said counterbore 10b of said base 10. Said screw 15 is tapped axially at its lower end portion 15a. Said base 10 has a recessed portion 10c at its bottom having a counterbore 10d to receive the head of a self-locking screw 14. Said base is drilled to permit said screw to be threaded into said micrometer screw 15 to hold the same locked in position. Said screw 14 is adapted to allow adjustment of said micrometer screw 15. Thus said base 10, screw 15 and thimble 17 operate as an integral unit. Said screw 15 will be threaded into said barrel 13b. Carried on said barrel 13b is a scale 13d. Said scale as here shown is the equivalent of one-half of an inch of linear movement and will measure onehalf inch of movement of said measuring screw 15 as it is rotated in barrel 13b and as indicated by the leading edge of thimble 11 moving over said scale. Each graduation on said scale is the equivalent of .025 inch. Hence each of said graduations represents one revolution of said measuring screw 15.

Adapted to slidingly t over said barrel 13C is a thirnble 17a on which isl carried a scale 1711 identical'with said' scale 11b. The upper end portion 17e of said thimble 17 has., a knurled Surface., Said no rtion 17.0,. hase threaded outer end'portion 17d of somewhat reduced diarrieter;Y A Xiaily disnosedin ,Said thirnble` 17 is a. micrometer Screw QL nieasuririg Screw 1 93 identi,'cal'- withl Said micrometer screw 145i.. Seidrnierpmeter screw. 19 has, its inner end portion 19a. Qf'redueeddiarneter. p.0Sitidiiedinl thejcounterb'ore 17e of said thimble 17; Saidscrew 19 isy axially tapnedatits. uriner end Dertien 19a- Saidthiimblle 171haS areeess. 171c 'at itsupperfetid to, reeeivethe head 0f ,a Selfleekl'ingiserewlland-.is `bored to permitsaid Screw table threaded into said tapped' portion o f said micrometer screw 1779. Thus saidthimble 17 and'screw 19 operate as an integral" unit. Said'meas'uringscrew 19 i'stthreaded into Saidbarre1.,.13-

Sir'nilar to.. the upperfendstructure of said thimble 11, said 'thimble 17. has a lower. portion 17j ofreduceddiameter havinga threaded shimlder 17g' adjacent thereto, a plurality of^apertures 1771 are formedinsaidlportionf adjacent said shoulder and respectively` seatedtherein are locking niembersl"here shownto be spherical'in form. Threadedonto said'shoulder 17g and overlying said'members- 23isa lock nut 24: Secured'in said thimble 1 7 adr jacent said lock nut is a retainingpin'ZS;

Threadedonto saidportion 17d( of'sai'd thimble 1 7"and upstanding therefrom is a bushingwZl. Said bushing is here shown to be cylindrical in form andhavingdtherein a.recess 2611.A Said' recess may be variously. formedand it" may be` formed to have various relationships formed between its width .atvariousfpoints and its depth. inthe embodimentv of" the invention hereillustrated saidjrecess isshown to be conical'in form andis representedto` have formedftherein an angle of j3t7'49".' Said'recess as'here illustrated has a maximum width oferte-half inch. The width at any; point; in said recess in a plane at right angles, to the axis of said bushing is the same dimension as the right=angled distance from said plane to the apex of the angle'formed by said' recess.

Carried-on saidbarrel113c adjacentv saidcentral por: tion 13a is a'scalej 13e; Said scale. inthe embodiment here illustrated? is calibrated v to establish a relationship betweenithe'Widthofl said recess at;various points therein andthe, righta'ngled distance from the different' planes of such` widths to` the apex of the` angle formed by, said recess; As indicated4 in; the present embodir'nent, said Widths atd-ilerent points and` the depth of' saidrecess will be thesame distance. Said scale 13e as here shown is-A identical to saidjscale 13d and a setting of saidscale toV correspond'to any desired'l widthy of said'recesswill resultina linear movement of saidbusningV and the recess therein# to correspondtoysaid width fromy a, zero reading pointon` said scale.

Thusjsaidscales lejand 17b`will measure the distance movedtby saidbushing-26ftohave Said'distance of'move- 4ment correspond to the Width atdifferent points in said recess.-

f Said-members 1-1, 17' and 26 are provided with recesses-271 shewrr herev asa convenient; holdingA means for ai tool' suchI asaL Spannerv wrench to rotate and' tighten saidl members: i

Applicants device with each ofI the scales thereon respectively set at their` zeroy points; will represent Ya known dimension in length. A

""With'reference, toFig,` l, a partialwiew ofamultiple drill head 28jistshown having amounted] therein drills 3&1., :31 and' 321.A For Pilrposeof illustration, saidfdrillswill lie respeyely4 designated, as having: diameters of one,- reighth of an inch,`one,fourtliof an inch, and three-,eighths oflan inch.VA Said diameters,measure;thel maximum cuting'lwidth ofA said drills, Applicants. device. isilIustrated Vbl `)cks"54'.v v l Y l In5 the.v embodiment efvl applicants; device asihereiillusasfyrestingnn a`,drill,tablety and. being supported on gauge A t 4.: trated, the lirst step in its operation will be to bring into alignment in a common plane at their rst point of maxi1 mum cutting width said drills 30, 31, and 32. Said drill 30 will be lowered to rest in said recess 26a and will be locked in this position. The tips of said drills are disregarded entirely in this operation. At the first point of maximum cutting width said drill 30 will measure oneeighth of an inch. Tlhe; planeofsaidwidth in said recess 26a will` be one-eighth of anrinchA in distance*frpnitlle apex-of the angle, formed by saidlrecessg., Portion/117e o fjthimble 17 'willi be rotatedgjto br'ringhrits lower Vbeveled edge te the Peint..ontsaidlsealetlet,where itzwllireadlz Said scale 17b is used to get an accurate reading ofthe third digit, Thisreadingn represents oneaeigh'tliV of an inch in linear measurement.

In the next step of the operation drill 31 will be brought into alignment in the same plane as said drill 30 by setting up applicants device thereunder, restingnsaid drill in said' recess' andfsettingscale 13e'and'17'b toPcoincide Withtheediameter of"said j`-dr ill which is here indicated to be'one-fourthinch: In the event it :is desired ,to havesaid drilllcutto lesser or greater ldepth than'saidtdrill30 its setting maybe-further modi'edbyuse of'scalesl 13d andi 1`1'b'f Said scales may be supplemented by-use of gaugeV blocks 34; Said drill 31will then-be lockedn'its d'esirddjposition. In-like'manner the remaining drillsji'n saidi multiple drill-head' will he; set.

Itjisf now seen-that-said'drillshavegb'een set'in; a'desired' relation witheachl other:` Applicants? deyice mayfnow beset up-under-any'one offthe drills offsaid` multiple` drill headjorit may remain under/.tirev last`drill setup andby means'ioflsa-id scales 13d land llfband'by-theiusef gauge blocksif necessary, a vdesired overall depthgof "cutmay-be established: The deviceitself-ashas4 been -indicatedirepresents i a-known dimensionwhich istakenfinto considera'- tion in calculating depth of cut.A With thexdepthoffcut having been established-for -onejofA the drills, eachofthe other drills will cut toa greater lorlesserdepth. aeord ingl to -1 the specific relation established;` between eachof the drills as set forth in theabovesteps: f Said? over all cutting depth is established) from the plane in` which-said drillshave been'broughtintoalignment at theirdirst` pointsfof"maximumv cutting Width- 4 Thus it isseen that wehaveprovi-deda'Simple andtef' iifcient depthsetting gauge, for-qui`clcly .and aceuratelyset'- tingindividual drills or ashere;y illustrated*- a plurality ofdrillsy in a multipledrill headwsettingfsaid `drills virxa specific relationwithV eac-h other; Said drills arel rst brought-into alignmenein-a common plane at'their points of maximum cutting width and atthe same-timethe desiredl relation ofYone 'with another may be established andf finally` atthe point" of any-drill f the over all cutting depth isV qguicklyset,4 up` 'from said plane of alignment. Applicantsi device is simply constructed andf'easitl'y operated to accurately and quicklyperform the function ofsettingupadrills foredesired'cutting ldepths It'willlof' course be understoodL that various changes may be made intheiferm, details, alrraiigement andiamportionsofrtheparts, Without departing .froml the.,Scone Of applicants invention, ,W-hieh, ,generallyfK Stated, Y. consists in a deyice capable ofjcarryingrout the.` objects aboyee't forth, in. thenarts and, combinations. 0f partsdisclosed anddeinedinthe, appended,daina` y Whati's claimedis: l i 1,. A; gauge ,or the, type describedv having. intonibvilla tion, amemher having aninternally threadedfbarrel upstanding therefrom, a,sec,ond member. haring; at oneeiid perdonan. axial bore adapted to. receive-thereuapartion offsaid barrel, Ia screwiintegral with said; lsecond member and'. adapted to bethreadedlinto.V saidbarrelyfor movably connecting( said; second,memberV and. said,barrel,` said second imember .havingat its. other endgportioil atcouiea'l recess, andaV scale on said,- barrelqhaving) graddations 'which .-are ,in ,proportion :to the-width, ,ofi said rreeessgatgdif.-

iersdt Reintsfwtierebyfsedeeeend memberseangyhemqyd axially to position any given point of the Width of said recess as desired.

2. The structure set forth in claim 1, a base member supporting said rst member and means associated with said base member and said first member for moving said iirst member axially of said base member.

3. A gauge of the type described having in combination, a base member, a sleeve upstanding therefrom, a screw axially disposed in said sleeve and having one end secured to said base, a member having oppositely extending barrel portions, said portions being internally threaded, one of said barrel portions being movable into said sleeve and adapted to have threaded thereinto the other end portion of said screw whereby said barrel is movable axially of said sleeve, a member having a sleeve adapted to receive herein the other of said barrel portions, a screw axially disposed in said last mentioned sleeve and having one end secured therein and having its other end threaded into said last-mentioned barrel portion for movably connecting said last-mentioned sleeve and said last-mentioned barrel, said last-mentioned member having a portion upstanding therefrom having a conical recess therein, and co-operating scales respectively on said last-mentioned sleeve and said last-mentioned barrel portion having graduations which are in proportion to the width of said recess at different points for determining the relative axial movement of said last-mentioned sleeve and barrel.

4. A gauge of the type described having in combination, a member having a recess therein with said recess having inclined sides, a base portion supporting said member and serving as a reference point, means associated with said base portion and said member for axially moving said member, and a linear scale associated with said member having graduations which are in proportion to the width of said recess at different points therein, said proportion being the cotangent of one-half of the apex angle whereby said member is moved to position a certain width of said recess at a certain point axially of said base member.

5. A gauge of the type described having in combination, a member having a conical recess therein forming an apex angle, means operatively associated with said member for vertical movement thereof, a linear scale carried by said means, said scale having graduations in proportion to the width of said recess at different points therein and said proportions being the cotangent of onehalf of said apex angle.

6. A gauge of the type described having in combination, a member having a recess therein with said recess having inclined sides forming an apex angle, a base portion, means movably connecting said member and said base portion for axial movement of said member, a linear scale associated with said means, said scale having graduations which are in proportion to the width of said recess at dierent points therein and said proportion being the cotangent of one-half of said apex angle whereby said member is moved in accordance with said scale to axially position a desired width of said recess at a desired point.

7. A gauge of the type described having in combination, an upstanding member having an upper end portion Ihaving a recess having inclined sides :forming an apex angle, a base portion, means movably connecting said member and said base portion for axial movement of said member, a linear scale associated with said means, said scale having graduations, the width of said recess at different points therein being in proportion to said graduations and said proportion being the tangent of one-half of said apex angle.

8. A gauge of the type described having in combination, a member having a conical recess therein forming an apex angle, means operatively associated with said member for vertical movement thereof, a linear scale carried by said means, said scale having graduations, the width of said recess at dilerent points therein being in proportion to said graduations and said proportion being the tangent of one-half of the apex angle.

References Cited in the tile of this patent UNITED STATES PATENTS 1,416,810 Foster May 23, 1922 1,797,122 Bohn Mar. 17, 1931 2,758,383 Breit Aug. 14, 1956 FOREIGN PATENTS 535,110 Germany Oct. 6, 1931 

